7/26/2019 IS-4031 (PART6)

1/6

lS r f03 l (Pr r t6 ) - |SSS

Indian

Standard

METHODS

OF

PHYSTCAL

ESTS

OR

HYDRAULIC

CEMENT

PART

6

DETERMINATION

OF

COHPRESSIYE

STRENGTH

OF

HYDRAULIC

CET.IENT

OTHER

THAN

I{ASONRY

CEMENT

(Wn

r"tg)

Second

.eprint

NOVEMBER

1996

UDC

666'94:.

539'1ll

BUREAU

OF

MANAK

BHAVAN.

@

Copyright 1988

INDIAN

STANDARDS

9

BATIADUR

SHAH

ZAFAR

MARG

Ctr

2

NEW DELHI I1OOO2

August

1988

7/26/2019 IS-4031 (PART6)

2/6

l S : r l 0 3 l ( P a r t 6 ) - f 9 8 E

Indian

Standard

METHODSOF

PHYSICAL

TESTSFOR

HYDRAULIC CEMENT

PART

6 DETERHINATION

OF

COMPRESSIVE

TRENGTH ,F HYDRAULIC

CEMENT

OTHER

THAN MASONRY

CEMENT

(

First

Revision

)

O.

FOREWORD

0.1

This

Indian

Standard

(

Part

6

)

(

First

Revision

)

was

adopted

by

the

Bureau

of Indian

Standards

on

l0

March

1988,

after

the

draft

finalized

bv the

Cement

and CoDcrete

Sectional

Committe6 had be en approved by the Civil

Engineering Division

Council.

0.2 Standard

methods

of

testing cemetrt

are

essential

adiunct

to

the cement

sPecifications.

This

standald

in

different

parts

lays

down the

Drocedure

or

the tests

to

evaluatc

the

physical

prooerties

of

different

types of

lrydraulic

cemenls.

Thd

procedure

for

conducting

chemical tests of

hvdraulic cemenl

s covered

n

IS

:4032-1985*.

O.l

Or;ginatty

all

the tests

o evaluate

he

physical

prooerties

of hydraulic

cements

were

covered in

one^standard

but

for

faci l i tat ing he useof this

standard

and future

revisions,

it

has

been

decided

to

Drint

the

different

tests

as different

parts

of

the

stai:dard and, accordingly this revi sed standard

has

been

brought

out in

thirleen

parts.

This will

also

facilitatc

updating

of individual tcsts.

Further,

since

publication of the original

standard

in 1958,

a number

of

standards covering

the

1.

SCOPE

1.1 This

standard

Part 6

)

covers

the

proccdure

for

determining

he

strength

of cementas epre-

sented

by compressive

strength

testson mortar

cubescorirpactedby meansof standard vibration

machine.

2,

SAMPLING

ANDSELECTION

OFTEST

SPECIMEN

2.1

The samples

f the cement

shall

be

taken n

accordance

ith the

requirements

f lS:

3535-

1986* and the

relevant

standard

specification or

rhe ype

of cement

eitg

tested.

The

representa-

tive

'aamDle

of

the

cement

selectedas

above

shallbe

thoroughlymixed

before

esting.

requirmnts

of

different equip$nt

uscd

for

testing

of

cement,a

brief

description

of which

was

alsocovered

n

the standard, ad

been

published.

In

this

revision,

therefore,

refereoce

s

given

to

different instrument specifi.cationsdeleting the

description of

the instruments, as it

has

been

recognized

hat reproducible

and

repeatable

est

results

an be obtainedonly

with

standard

esting

equipment

capable of

giving

desired

level

oT

accuracy.

This

part

covers

the

metbod

for

determining he

compressivetrelgth

of

hydraulic

cement

other than masonry cement

which

is

covered

n

Part

7

of this

standard.

The

criteria

fcr

accepting compressive

trength

values

has

bcen

incorporaled

a_n{ the use.

f single

graded

sand

has

been

deleted

n

this revision.

0,4

For

the

purpose

of

deciding

whether

a

parti-

cular requirementof this

standard

is

conplied

with, the final value,

observed

or

calcuiated.

expressing he result of a testor analysis, shall

be

roundedoff

in

accordance

ith

IS : 2

-

1950*.

The number

of significant

places

etained in

the

rounded

off

value

should

be

the same

as

that

of

the specified

glue n this

standard.

rMthod

of

chcmicd

analyris

of

hydrarilic

ceoent

(

fir

st

retision

).

+Rules

for

rounding

off numerical valres

(

rcttEed

),

3. TEMPERATURE

AND

HUMIDITY

3.1

The

temperaturc

of

moulding

room,

dry

materials

nd

water shall

be maintained

at 27 i

2"C. The

relative

humidity

of the

laborato-rv

shallbe 65 :t 5 percent.

-

3.2

The

moist

closet

or moist

room

shalt

be

maintained at 21

t

2"C

and at

a relative

humi-

dity

of

not less han

90

percent.

4. GENENAL

d.l

$tandard Sand

-The

standard

sand

to

be

used

n

the

test

shall

conform

to IS :

650-1966*.

5.

APPARATUS

5.1

Vibration

Machine

-

Vibration

machine

+Methods

of

sampling

hydraulic cement

(/irs,

_

Specification

for standard

saod

for

tetting

of

ccmbor

retision

l.

(

first

rcvision

l.

7/26/2019 IS-4031 (PART6)

3/6

tS :d031

F. r l t6 ) - rgEE

conforming

o lS

:

10080-1982'.

5.2

Poking Rod

-

Poking rod

conforming

to

lS : 10080- i982t .

5.3

Cube

Mould

-

The mould shall

be of

70'6

mm sizeconforming o IS : 10080-1982*.

5.{ Gauging

Trowel

--

Gauging trowel

shall

have a

steel blade 100 to

150 mm in

length

wirh

straight

edgesweighing210

f

l0 g.

5.5

Brlaace

-The

balanceshall conform to

the

following

requirements

On ba lance n

use, the

permissible

ariation

at

a

load

of I

000

g

shall be

A

l '0g.

The

permissible

variation

on trew

balanCe

shall' be one-half

ol

this value.

The

sensibility

reciprocal

shall be not

greater

han

twicc

the

permissible

ariation.

Noru

I

-The

senribility

reciprocal ir

generally

defncd a8 tho change

n

load requircd to changc

thc

posirion

of rcat

of

the

indicating

clcmcnt

or

clementg

al a non-automalic indicating scelc a defiDitc

amount of

any load.

No'r'r

2

-

Self-indicating balancc with

equivalent

accuracy

may

also be used.

5.6

Standard

Weights

-

The

permissible

vari-

ation on weights

n use

n

weighing

the

cemnt

t

TAEI,E

I

PERMISSIBLE

VARIATIONS

ON

WEIG

TS

PrrwrggrrLr

VAg'raqoN

olr

Wnrosrs

rrs Ugr

(2)

(s)

+0'35

+0'30

+0'45

+0'2o

i f l5

+0'10

*o{)5

+r(x

+om

+o'02

+0ol

and the

temperature

of

water and

that

of the

test

room at the

time

when

the abovc

operations

are

being

performed

shall

be

27

l.2C,

Potable/

distilled

water

shall

be used

in

preparing

the

cubes.

6.1.2 The material for eachcube shall be

mixed

separately

and the

quantity

ofcement,

standard

sand

and water

shall

be as

l.rllows :

Cement

200

g

Standard

600

g

Sand

l P

\

Wa te r

( 7

+ I

O ; pe r cen t

o f

combined

massof

cement and

sand,

whether P

is

the per-

centage

of water

required

to

produce

a

paste

of standard

consistency

determined

as

described

in IS

: 4031

(

Parr

4 ) - 1988* .

6.1.3 Placc

on a

nonporousplate,

a m ixture of

cement

and

standard

sand.

Mix i t

drv

wi th

a

trowel

for

one

minute and rhen

with

water until

the

mixture

is of

uniform

colour,

The

quantity

of

water to

be used

shall be

as specified

t

6.1.i.

The

time

of

mixing

shall in any

lvent

be

not

less

than

3 min

and should rhe

t ime

taken

to obtain

a uniform

colour

exceed 4

min, the

mixture shall

F

rejectpA

and the

operation

repeaied

with

a

fresb quantity

of

cementl sand

and *atcr.

6.2

Moulding

Spc,'i'ncncr

6.2.1_

rl_

ssembling

the

moulds

ready

for use,

covcr

the

joints

between he

halves

of the

mould

with. a thin. fi lm of perroleum jelly and apply a

slmttar

coartDg

of

petroleum

jelly

betwecn

the

contact

surfacs

of thc

bottom

of ihe

mould and

its

base

plate

in

order

to ensure

that

no water

oscapes

during vibration.

Treat

the

intcrior faccs

of the

mould

with a thin

coating

of

mould oil.

6,2.2 Place

the

assembled

mould

on thc table

of the

vibration

machine and

hold

it

firmly

in

position

by

means of

a suitsble

clamp.

Atta6h

a

hopper

oF suitable

size and

shape

seiurelv

at the

top of

the

mould

to

facilitati

filling

and this

hopper

shall not

be removed

until

the

completion

of the

vibration

period.

6.2.3

Immedialely

after mixing

the

mortar

in

accordance

with 6.1,

place

the mortar

in the cube

mould and

prod

with

the

rod specified

in

5.2

The

mortar

shall

be

prodded

20 timis

in

about

8

s

to

ensure

elimination

of entrained

air and

honev-

combing. Place

the

remaining

quatrtity

i, t

mortar

in the

hopper of

the cube

mould

and

prod

again

as

specified for

the

first layer

and

then

compact the

mortar

by vibration.

6.2.4 The period

of vibration

shall

be

two

mrnutes

at the.

specified

speed

of

12

Ofi)

*

400

vrbfatlon

per

minute.

_

.lvr"tfroas

of

ptvsical

ests or

hydraulic

cemeDt:

art

4

Dctermination

of

consirtency

of

dandard

clmcnt

paste

(

flrst

rolslon

).

-

WrroET

( l )

(c)

500

3m

2fi

z)0

100

50

m

l0

5

I

5,7 Graduatod

Glass Cyliadere

-

Graduated

glass

cylinders

of 150 o

200

ml

capacity.

The

peruiissible

variation on

these

cylinders

shall

be

*

I

ml.

The

main

graduation

ines

of

the

cylin-

ders shall be in circlesand shall bc numbered.

The least

graduations

shall

extend

at least

one-

seventh of

the

way around,

and iutermediatcgra-

duations shall

extendat least

one-fifth

of

thc

tav

arouDd

hc cylinder.

The

graduation

lines may

be omltted for

the

lowest

5 rnl.

6.

PREPARATTON

OF TEST

SPECTMENS

6.1

Mir

Proportions

and Miring

6.1.1

Clean

appliances

hall

be used

or

.Spcci0cation

tor

vibretion

machinc for

calting

stsndard

cflrcnt mortar

cubcr.

mrxlnS

7/26/2019 IS-4031 (PART6)

4/6

AMENDMENT

NO.1

MARCH

1993

TO

IS

4031

Part

6

)

:

1988 METHODS OF

PHYSICAL

TESTS

FOR

HYDRAULIC

CEMENT

PART6DETERMINATION

F COMPRESSIVESTRENGTH

F

HYDRAULICEMENT THER HANMASONRY EMENT

(

First Revision

(Page2,

clause .4)-

Subsriturehe

following

for the

existing

clause:

'5.4

Gauging Trowel

-

Gauging

trowel conforming

to IS 10086

: 19821.'

(

Page 2,

foot-note

)

-

Insert

the

following

fooi-note at the

end:

'tSoecification

for moulds

for uso in tess

of

cement

and concrete.'

( cED 2)

Prioted

at

Dee

Kay Printers,

New

Delhi_

l@15.

India.

7/26/2019 IS-4031 (PART6)

5/6

6.2.5 At

the

end

of

vibration,

remove

the

mould

togethr with the base

plate

from the

machine

and

finish the

top

surface

of the

cube

in

the mould by smoothing

the surface with

thc

bladc of a

irowel.

63

Curing

Speci."ena

--

Keep

the

6lled

moulds

rn

moist clos et or

moist

room

for 24 hours

after

completion of vibration.

At the

end of that

period,

remove

them

from

the moulds and

immediately submergc

in clean

fresh water and

keep

there

until

taken

out

just

prior

to

breaking.

The

water

in which the

cubes

are

submerged shall

be

renewed

every

7

days and

shall

be

maintained

at

a

temperature

of

27

+

2'C.

After

they

have

been taken

out

and

until they

are broken, the

cubes

shall not be aliowed

to

become dry.

7. TESTING

?"1 Test

three cubcs

for compressive

strength

fo r

each

period

of

curing

mentioned

under

th1

rele-

vant specifications for different hydraulic

cements,

the

periods

being

reckoned

from

the

completion

of

vibration.

I S : 4 0 3 1

( P e r t 6 ) - 1 9 S S

7.1.1 The

cubes

shall be

tested

on their

sides

witltout

rny packing

between

the

cube and

the

steel

plattens

ofthe

testing

machine.

One

of the

plr t tcns

shir l l be carr ied

on

a

baseand

shal l

be

self-ad-itrsting,

nd

the

load

shall

be

steadity

and

uniformlv applied, starting from zero at a raie

of

35

N/mm'z/min.

8.

CALCULATION

8.1 The

measured

compressive

strength of

the

cubcs shall

be

calculated

by dividing the

maxi-

mum load

applied

to

the

cubes

during

the

test

by

lhc cross-sectional

area,

calculated

rom the

mean

dimensions

of

the section

and

shall

be expressed

to

the nearest

0'5 N/m6'?.

In determining

the

comprcssive

trength, do

not consider speciirens

that are

mani fes l ly au l ty ,

or

t l ra l

g ive

strengths

dif fer ing

by more

than

l0 percenl

l rom

the

averagevalue

of

all the

test

specimens. After

discarciing

specimens

or

strength values, if less

than

two

strength

values

are left

for determining

the

compressivestrength at any given period,

a

retest

shall

be made.

7/26/2019 IS-4031 (PART6)

6/6

Ilureauof

Indian

Standards

BIS is a statutory institution

establishe